204220439 has 4 divisors (see below), whose sum is σ = 216233424. Its totient is φ = 192207456.

The previous prime is 204220411. The next prime is 204220463. The reversal of 204220439 is 934022402.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 204220439 - 2¹⁶ = 204154903 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204220409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6006467 + ... + 6006500.

It is an arithmetic number, because the mean of its divisors is an integer number (54058356).

Almost surely, 2^204220439 is an apocalyptic number.

204220439 is a deficient number, since it is larger than the sum of its proper divisors (12012985).

204220439 is a wasteful number, since it uses less digits than its factorization.

204220439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12012984.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 204220439 is about 14290.5716820567. The cubic root of 204220439 is about 588.8884933755. Note that the first 3 decimals are identical.

The spelling of 204220439 in words is "two hundred four million, two hundred twenty thousand, four hundred thirty-nine".